The maj13 chord, short for major 13th, is a rich and lush chord that embodies a major 7th chord with the addition of a 9th, 11th, and 13th. This gives it a full, warm, and somewhat jazzy sound that's popular in genres like jazz, soul, and funk. The chord is built on a major triad and a major 7th as its foundation, with the 13th adding a subtle complexity to its overall texture. Guitarists often omit certain notes like the 9th or 11th due to the physical limitations of the guitar, instead focusing on maintaining the critical intervals of the chord. Mastery of the maj13 chord requires understanding of its intervals and skilled voicing, often needing extended finger stretches or creative use of open strings.